public function videoPoints(video $video)
 {
     //we get the user
     $user = $video->getUser();
     $challenge = $video->getChallenge();
     //if the video is for an ambassador challenge
     if ($challenge->getType() != 'normal') {
         //we give the user 0 points
         $video->setScore('0');
     } else {
         if ($video->getRepetitions() >= $challenge->getSix()) {
             $video->setScore('300');
         }
         if ($challenge->getSix() > $video->getRepetitions() && $video->getRepetitions() >= $challenge->getFive()) {
             $video->setScore('250');
         }
         if ($challenge->getFive() > $video->getRepetitions() && $video->getRepetitions() >= $challenge->getFour()) {
             $video->setScore('200');
         }
         if ($challenge->getFour() > $video->getRepetitions() && $video->getRepetitions() >= $challenge->getThree()) {
             $video->setScore('150');
         }
         if ($challenge->getThree() > $video->getRepetitions() && $video->getRepetitions() >= $challenge->getTwo()) {
             $video->setScore('100');
         }
         if ($challenge->getTwo() > $video->getRepetitions() && $video->getRepetitions() >= $challenge->getOne()) {
             $video->setScore('50');
         }
         if ($challenge->getOne() > $video->getRepetitions()) {
             $video->setScore('0');
         }
     }
     //we flush the video.
     $this->em->persist($video);
     $this->em->flush();
     //get all the videos of the user.
     $listVideos = $this->em->getRepository('BFSiteBundle:Video')->allVideos($user);
     //recount the points of the user
     $points = 0;
     $oldvideo = null;
     foreach ($listVideos as $video) {
         //compter les likes pour la vidéo.
         $likePoints = count($video->getLikes()) * 5;
         // 5 points par like.
         $points = $points + $likePoints;
         //compter les points de la vidéo et éventuellement les 20 points d'entraînement
         if ($oldvideo === null) {
             $points = $points + $video->getScore();
         } elseif ($oldvideo->getChallenge()->getId() == $video->getChallenge()->getId()) {
             //It's the same challenge.
             //Look for 20 points
             if ($video->getScore() < $oldvideo->getScore()) {
                 //give 20 points for improvement.
                 $points = $points + 20;
             }
         } elseif ($oldvideo->getChallenge()->getId() != $video->getChallenge()->getId()) {
             //It's a new challenge.
             $points = $points + $video->getScore();
         }
         $oldvideo = $video;
     }
     $user->setPoints($points);
     $this->em->persist($user);
     $this->em->flush();
     $done = true;
     return $done;
 }